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Cushion|Natural|GIA

1.55ct J SI1 Cushion Natural Diamond

EX • J/SI1 • GIA 6452554551

Certificate GIA 6452554551

Diamond specifications and retailer prices

From £3,266 GBP
$4,376 USD
As of November 1, 2026
Save £3,318 GBP (50%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £6,584 GBP at MOH London · As of November 1, 2026
View at MOH London

About this 1.55ct natural cushion diamond

This 1.55ct natural cushion sits in the one-and-a-half to two carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6452554551. Listed at 17 retailers as of November 1, 2026, with prices from £3,266 to £6,584, a £3,318 spread on the same certified stone. MOH London lists it at £6,584. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.55
Carat
J
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.3°
Pavilion angle38.3°
OriginNatural
Grading LabGIA
CertificateGIA 6452554551
Dimensions6.70 × 6.49 × 4.49 mm
L/W Ratio1.03
Top View
6.70 mm6.49 mm1.55 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6452554551
Side View
Table 59.0%Crown 36.3°Girdle: 3.4Pavilion 38.3°Culet: NoneDepth 69.1%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: £6,584 GBP|Low: £3,266 GBP|High: £6,662 GBP|Avg: £4,317 GBP|-1.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 6£3,266 GBP
Retailer 7£3,317 GBP
Retailer 9£3,456 GBP
Retailer 8£3,744 GBP
Retailer 4£3,977 GBP
Retailer 3£4,033 GBP
Retailer 10£4,140 GBP
Retailer 2£4,413 GBP
Retailer 5£5,081 GBP
MOH London£6,584 GBP

36 data points across 10 retailers

17 retailers£3,266 GBP to £6,584 GBP

B+
Cheapest Retailer
-
£3,266 GBP
$4,376 USD
B+
Retailer 2
-
£3,317 GBP
$4,445 USD
View
B
Retailer 3
-
£3,456 GBP
$4,631 USD
View
Final sale: no returns
B
Retailer 4
-
£3,517 GBP
$4,713 USD
View
B
Retailer 5
-
£3,523 GBP
$4,720 USD
View
B+
Retailer 6
-
£3,744 GBP
$5,017 USD
View
B
Retailer 7
-
£3,938 GBP
$5,277 USD
View
B+
Retailer 8
-
£3,977 GBP
View
B
Retailer 9
-
£4,033 GBP
View
Retailer 10
-
£4,140 GBP
A$8,534 AUD
View
Price last confirmed 23 days ago
B
Retailer 11
-
£4,194 GBP
$5,620 USD
View
B
Retailer 12
-
£4,194 GBP
$5,620 USD
View
B
Retailer 13
-
£4,336 GBP
$5,810 USD
View
B
Retailer 14
-
£4,413 GBP
€5,631 EUR
View
Retailer 15
-
£4,561 GBP
$6,111 USD
View
Price last confirmed 10 days ago
B
Retailer 16
-
£5,081 GBP
ZAR 109,980 ZAR
View
Most Expensive
B
MOH London
865F3525F · Nov 1
£6,584 GBP
View
16 more retailers have this diamond
Prices start from £3,266 GBPSave up to £3,318 GBP

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

B+
1.55ct Cushion
£3,266 GBP